To tell by a Watch Dial the Hour when a Person intends to rise.
The person is told to set the hand of his watch at any hour he pleases, which hour he tells you; and you add in your mind 12 to it. You then desire him to count privately the number of that addition on the dial, commencing at the next hour to that at which he intends to rise, and including the hour at which he has placed the hand, which will give the answer: for example.
A intends to rise at 6, (this he conceals to himself;) he places the hand at 8, which he tells B, who, in his own mind, adds 12 to 8, which makes twenty. B then tells A to count twenty on the dial, beginning at the next hour to that at which he proposes to rise, which will be 5, and counting backwards, reckoning each hour as one, and including in his addition the number of the hour the hand is placed at, the addition will end at 6, which is the hour proposed; thus,
| The hour the hand is placed at is | 8 |
| The next hour to that which A intends to rise at is 5, which counts for | 1 |
| Count back the hours from 5, and reckon them at 1 each, there will be 11 hours, viz., 4, 3, 2, 1, 12, 11, 10, 9, 8, 7, 6 | 11 |
| ——— | |
| Making | 20 |
A person having an even Number of Shillings in one Hand, and an odd Number in the other, to tell in which hand the odd or even Number is.
You desire the person to multiply the number in his right hand by an odd figure, and the number in his left by an even one; and tell you if the products, added together, be odd or even. If even, the even number is in the right hand; if odd, the even number is in the left. For instance,
| I. Number in the right hand is even | 18 | In the left hand odd | 7 |
| Multiply by | 3 | Multiply by | 2 |
| ——— | ——— | ||
| Product | 54 | Product | 14 |
| Add the Product of the left hand | 14 | ||
| ——— | |||
| Which produces a total of | 68 | ||
| II. Number in the right hand is odd | 7 | In the left hand even | 18 |
| Multiply by | 3 | Multiply by | 2 |
| ——— | ——— | ||
| Product | 21 | Product | 36 |
| Add the Product of the left hand | 36 | ||
| ——— | |||
| Which produces a total of | 57 | ||
Secret Correspondence.
To carry on a correspondence without the possibility of the meaning of the letter being detected, in case it should be opened by any other person, has employed the ingenuity of many. No method will be found more effectual for this purpose, or more easy, than the following.
Fig. 1.